Home / 12,991.20-19,496.40-9,694.08

Finding the Fourth Proportional to 12,991.20, 19,496.40 and 9,694.08

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Solution

The fourth proportional to 12,991.20, 19,496.40 and 9,694.08 is: 14,548.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991.20 : 19,496.40 = 9,694.08 : x
  2. Step 2: Convert to fraction form
    12,991.20/19,496.40 = 9,694.08/x
  3. Step 3: Cross multiply
    12,991.20x = 19,496.40 × 9,694.08
  4. Step 4: Simplify right side
    12,991.20x = 188,999,661.31
  5. Step 5: Solve for x
    x = 188,999,661.31/12,991.20
  6. Step 6: Final answer
    x = 14,548.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.